* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4cb9ac;
    --primary-dark: #3a9b8f;
    --secondary-color: #5ecfc1;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #cbd5e1;
    --light: #f8fafc;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    background-color: var(--white);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 1rem 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: var(--primary-color);
}

.btn-primary {
    background: var(--gradient);
    color: var(--white) !important;
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--light) 0%, var(--white) 100%);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.store-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: var(--dark);
    color: var(--white);
    text-decoration: none;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    min-width: 200px;
}

.store-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.store-icon {
    font-size: 2.5rem;
}

.store-text-small {
    font-size: 0.75rem;
    opacity: 0.8;
}

.store-text-large {
    font-size: 1.1rem;
    font-weight: 600;
}

.app-store {
    background: var(--dark);
}

.google-play {
    background: var(--primary-color);
}

/* Pillars Section */
.pillars {
    padding: 80px 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.pillar-card {
    background: var(--light);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.pillar-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.pillar-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.pillar-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.pillar-card p {
    color: var(--gray);
    line-height: 1.8;
}

/* Features Detail */
.features-detail {
    padding: 80px 0;
    background: var(--light);
}

.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 5rem;
}

.feature-block.reverse {
    direction: rtl;
}

.feature-block.reverse > * {
    direction: ltr;
}

.feature-content h2 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.feature-subtitle {
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-content p {
    color: var(--gray);
    line-height: 1.8;
    font-size: 1.1rem;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    color: var(--gray);
    line-height: 2;
    font-size: 1.1rem;
    padding-left: 1.5rem;
    position: relative;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.feature-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-placeholder {
    width: 300px;
    height: 300px;
    background: var(--gradient);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 8rem;
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
}

/* Security Section */
.security {
    padding: 80px 0;
    background: var(--dark);
    color: var(--white);
    text-align: center;
}

.security-content {
    max-width: 800px;
    margin: 0 auto;
}

.security-quote {
    font-size: 2rem;
    font-weight: 700;
    font-style: italic;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.security-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--gray-light);
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background: var(--light);
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 2rem;
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--gray-light);
    font-size: 1.1rem;
}

.footer-links h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-links a {
    display: block;
    color: var(--gray-light);
    text-decoration: none;
    margin-bottom: 0.8rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--dark-light);
    color: var(--gray);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .feature-block {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .feature-block.reverse {
        direction: ltr;
    }

    .feature-placeholder {
        width: 250px;
        height: 250px;
        font-size: 6rem;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .pillars-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-brand {
        max-width: 100%;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .store-btn {
        width: 100%;
        max-width: 300px;
    }

    .feature-content h2 {
        font-size: 1.8rem;
    }

    .security-quote {
        font-size: 1.5rem;
    }

    .cta h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .pillar-card {
        padding: 1.5rem;
    }

    .pillar-icon {
        font-size: 3rem;
    }
}